kimyoda necha element bor, 128, 118, 119, 228, kislorodnin valentligi, 2, 4, 6, 3, vodorod massasi, 2, 1, 4, 3, natriyning tartib raqami, 10, 9, 11, 12, ftorning valentligi, 1, 2, 7, 8, idish nomi, probirka, kolba, shtativ, shpatel.

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